Try using mineral spirits. Apply it dripped on cotton, on the wrong side of the fabric in place fixing rhinestones. Wait about a minute and carefully remove the crystal. Be sure to check the fabric on its solvent resistance. White spirit is quite aggressive, instead it is possible to try to put gasoline on lighters.
Heat the tissue area, which kept rhinestones, hot iron. Better to do it on the wrong side of things, using a thin gauze and cloth, so as not to burn the product. Immediately remove the crystals, because the glue on which they are held, has the ability to rapidly solidify.
Put the thing in half an hour in the freezer, and then carefully, so as not to damage the fabric, with a sharp object remove the crystals by placing a knife under the crystal and lifting it. The method will be effective only if the decoration pasted on the resinous adhesive.
Dip the cloth with crystals in hot water, in which a solution of vinegar, boric acid and ammonia in equal amounts. This composition acts on the adhesive that secures the decorations. After one hour, remove the product from the solution and then, almost pressing it, try to remove the crystals, one after the other by placing them under the base of something thin and sharp. Be careful not to damage the fabric.
Shoot with rhinestone hair, nails or eyelashes at home must be careful. Thus it is necessary to use special cosmetics to dissolve the adhesive on crystals. In order to avoid various troubles best to contact the salon where you made them cover.